Random forest-based prediction of decay modes and half-lives of superheavy nuclei

分类： 物理学 >> 核物理学 提交时间： 2023-10-12

CAI, Boshuai YUAN, Cenxi

摘要： How nuclides decay in the superheavy region is key information for investigating new elements beyond oganesson and the island of stability. The Random Forest algorithm is applied to study the competition between different decay modes in the superheavy region, includingdecay,decay,+decay, electron capture and spontaneous fission. The observed half-lives and dominant decay mode are well reproduced. The dominant decay mode of 96.9 % nuclei beyond212Po is correctly described.decay is predicted to be the dominant decay mode for isotopes in new elementsZ= 119122, except for spontaneous fission in some even-even ones because of the increased Coulomb repulsion and odd-even effect. The predicted half-lives show the existence of a long-lived spontaneous fission island at the southwest of298Fl caused by the competition of nuclear deformation and Coulomb repulsion. More understanding of spontaneous fission, especially beyond286Fl, is crucial to search for new elements and the island of stability.

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